Await is a reserved word error inside async function

In order to use await, the function directly enclosing it needs to be async. According to your comment, adding async to the inner function fixes your issue, so I’ll post that here:

export const sendVerificationEmail = async () =>
  async (dispatch) => {
    try {
      dispatch({ type: EMAIL_FETCHING, payload: true });
      await Auth.sendEmailVerification();
      dispatch({ type: EMAIL_FETCHING, payload: false }))
    } catch (error) {
      dispatch({ type: EMAIL_FETCHING, payload: false });
      throw new Error(error);
    }
  };

Possibly, you could remove the async from the outer function because it does not contain any asynchronous operations, but that would depend on whether the caller of that sendVerificationEmail is expecting sendVerificationEmail to return a promise or not.